Kent Hughes provides this answer:
This does not mean these believers saw everything eye to eye. It is wrong to suppose, as sadly some do, that when believers dwell in unity they will carry the same Bible, read the same books, promote the same styles, educate their children the same way, have the same likes and dislikes—that they will become Christian clones. The fact is, the insistence that others be just like us is one of the most disunifying mind-sets a church can have because it instills a judgmental inflexibility that hurls people away from the church with lethal force. One of the wonders of Christ is that he honors our individuality while bringing us into unity.
 R. Kent Hughes, Acts : The Church Afire, Preaching the Word (Wheaton, Ill.: Crossway Books, 1996), 69.